The annual Haunted Bonfire at Alameda Park will be held at 6:30 p.m. Oct. 26. Take a lawn chair to enjoy an evening of ghost stories, hot chocolate, popcorn, hot dogs, a pinata and the Alameda Treasure Scramble. Registration is $7 per child through Oct. 18. After that, registration will be $9. Call 724-284-5383.

Slippery Rock University’s Robert A. Macoskey Center for Sustainable Systems Education and Research will host a Harvest Fest from 1 to 5 p.m. Oct. 26. It will be followed by Halloween hikes beginning at 7 p.m. The free, family friendly event at the center located on Harmony Road, across from Mihalik-Thompson Stadium, will include vendors offering food, apple cider and apple butter demonstrations, live music, and a 2 p.m. scarecrow-building contest. Visit www.sru.edu/RAMC.

Jennings Environmental Education Center, Route 528, Brady Township, presents “Black Cats and Witches’ Hats” to investigate the mysteries of an autumn night at 7 p.m. Oct. 27. Jennings is open 8 a.m. to 4 p.m. weekdays and on weekends as scheduled. Call 724-794-6011.